/
json.go
61 lines (53 loc) · 1.33 KB
/
json.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
package tricorder
import (
"bytes"
"encoding/json"
"github.com/Symantec/tricorder/go/tricorder/messages"
"net/http"
)
var (
jsonUrl = "/metricsapi"
)
func jsonAsMetric(m *metric, s *session) *messages.Metric {
var result messages.Metric
m.InitJsonMetric(s, &result)
return &result
}
type jsonMetricsCollector messages.MetricList
func (c *jsonMetricsCollector) Collect(m *metric, s *session) (err error) {
*c = append(*c, jsonAsMetric(m, s))
return nil
}
func jsonSetUpHeaders(h http.Header) {
h.Set("Content-Type", "application/json")
h.Set("X-Tricorder-Media-Type", "tricorder.v1")
}
func jsonHandlerFunc(w http.ResponseWriter, r *http.Request) {
r.ParseForm()
jsonSetUpHeaders(w.Header())
path := r.URL.Path
var content []byte
var err error
if r.Form.Get("singleton") != "" {
m := root.GetMetric(path)
if m == nil {
httpError(w, http.StatusNotFound)
return
}
content, err = json.Marshal(jsonAsMetric(m, nil))
} else {
collector := make(jsonMetricsCollector, 0)
root.GetAllMetricsByPath(path, &collector, nil)
content, err = json.Marshal(collector)
}
if err != nil {
handleError(w, err)
return
}
var buffer bytes.Buffer
json.Indent(&buffer, content, "", "\t")
buffer.WriteTo(w)
}
func initJsonHandlers() {
http.Handle(jsonUrl+"/", http.StripPrefix(jsonUrl, gzipHandler{http.HandlerFunc(jsonHandlerFunc)}))
}